Ribbon vibrator for typewriters



Oct. 28 1924.

' O. A. HOKANSON RIBBON vIBRAToR Fon TYPEwRITERs Filed Aug. 29. 3 Sheets-Sheet 1 Ocnzs. 1924. 1,513,394

o. A. HoKANsoN RIBBON VIBRATOR FOR TYPEWRITERS Filed UL 29. 1921 15 Shot-Shet 2 Get. 28, 19%.. Eg@

o. A. Hammam RIBBON VIBRATOR FOR TYPEWRITERS Filed Aug. 29. 1921 s sami-@Smm Patented ct. 28, 1924.

OCLTO A.. HOKAN SON, OF WOODSTOCK, ILLINOIS, ASSIGNOR TO WOODSTOCK TYPEWRITEE COMPANY, vOF WOODSTOCK, ILLINOIS, A CORPORATION F D'JLINOIS.

RIBBON VIISRATOR FOR TYPEWRITERS.

To all whom t may concern.'

Be it known that I, OTTO A. HOKANSON, a citizen of the United States, residing at Woodstock, in the county of McHenry and State of Illinois, have invented lcertain new and useful Improvements in Ribbon Vibrators for Typewriters, of which the following is a specification.

This invention relates to typewriter mechanism and especially to that portion of a typewriter by which the ribbon is moved into and out of position to cover the printing point and is more particularly applicable to typewriters that fold into -a compacted position. v

The object of the invention is to provide mechanism of the class named which shall be of improved construction and operation.

The invention is exemplified in the combination and arrangement of parts shown in 'the accompanyingv drawings and described in the following specification, and it is more particularly pointed out in the appended claims.

In the. drawings- Fig. 1 is a vertical sectional view through a typewriter showing one embodiment of the present invention applied thereto, the parts being shown in folded position;

Fig. 2 is a fragmentary sectional view of a portion of a typewriter showing the ribbon vibrator in its operating position lin side elevation;

Fig. 3 is a fragmentary section substantially on line 3--3 of Fig. 2; and

Fig. 4 is a vertical section of a portion of a typewriter showing the ribbon vibrator in front elevation.

In the drawings, the numeral 10 designates the main=or base frame of a typewriter having arms 11 pivoted at 12 thereon. The arms 11 carry aA platen carriage frame 13 having a platenl carriage 14 and platenl 15 mounted to slide thereon transversely of the machine. Key levers 16 are pivoted at 17 on the frame 10 and are connected by sublevers 18 and links 19'to the type bars 20. The type bars 2O are carried by a. type bar segment 21V supported by the main frame. Ribbon spools 22 are carried on brackets 23 at each side of the main frame and a ribbon 24 passes over guides 25 andthrou h loo s 26k on the ribbon vibrator 27 by w ich t e ribbon is moved to cover and uncover the printing point.

chine frame and pivot-ally mounted therein.

bar 31 engages a lug 32 formed on the platment plate 40.

The vibrator 27 is slidably mounted on a supporting frame or bar 28 which is fixed to a rod 29 extending transversely ofthe ma- The guides 25 are also rigidly fixed to the rod 29. An arm 30 projects rearwardly from the rod 29 and extends through a slot in a bar 31 slidably mounted on the rear of the machine' frame 10. The upper end of the en carriage frame 13 when the platen carriage frame is in operating position so thaty .the bar 31 is. held downwardly Vby the platen carriage frame, thus` supporting the ribbon vibrator frame 28 in its operating position shown in Fig. 2. 4When the platen carriage frame is foldedl to its compacted position shown in Fig. 1 the bar 31 slides upwardly permitting the varm '30 and the rod y29 to rotate in a oounterclockwise direction to bring the vibrator frame 28 into folded position shown in that figure.

The'ribbon vibrator 27 is provided with a pair of tongues 33 bent over the edges ofthe frame 28 to guide the vibrator in its movement along the frame and lugs 34 on the frame 28 limit the `downward movement of the vibratorlto bring the ribbon to rest at a fixed initial position with the printing point uncovered. The lower endV of the vibrator 27 is provided with a pivot pin 35 projecting through a slot 36 in a curved arm 37 which extends through a slot in the frame 28. The arm 37 is formed integrally with a bar 39 wh1'ch extends laterally from a seg- The plate 40 is pivotally held by a screw 41 on a bracket 42 secured to the rear wall of the main frame 10. An arcuate Harige 43 is supported on the 'segment 40 and is spaced therefrom by connecting supports 44. An. arm 45 also pivotally mounted on the screw 41 projects throu the slot between the segment 40 and t e flange 43 and is provided with a finger-piece 4 6 at its forward end by which it may be moved vertically relative to the segment 40. As shown best in-Fig. 3, a at spring 47 is supported vby the screw 41 and bears against arm 45 and flange 43 to hold the arm 45 against the segment 40. The arm 105 45 carries a pin 48 to enga e a series of depressions 50, 51 and 52 in t e segment 40. By moving the finger-piece 46 the arm .45 may be shifted to bring the pin 48 intoengagement with any one of the d y axis.

g Laisser.

50, 51 and 52. so as to adjust the arm 45 relative to the segment. 4Projecting downwardly from the portion of the arm adjacent .the screw 41 is a lug 53 carrying a pin 54 in position to be engaged by a contact-piece 55 secured by screws 56 on an arm 57 projecting upwardly from a bar 58. 'l `he bar 58 extends transversely of the machine frame and is pivoted between the side walls thereof to osciliate about its longitudinal I 'A pair of arms 59 project forwardly from the `bar 58 and are provided with pin and slot connections 60 with arms 61, the arms l thus uncovering the printing point. shown in the drawings, the` downward move- 61 'being pivotally mounted at 62 on the main frame.. A `universal bar 63 is suspended by links 64v from the arms 61 in position to be engaged by the key levers 16.

Each time a le'y lever is depressed Lthe bar 58 will be rockedto move the contact member 55 forwardly `causing it to engage the pin 54 and swing the arm 45 upwardly. rl`he u ward movement of the arm 45 car- `ries with it 'the segment 40 byv which the slotted armk 37 is carried. rlhis will move the pivot pin 35 'upwardly and shift the ribbon vibrator to bring the ribbon over the printingpoint at the time that the type bar 2O is actuated` by the key lever to cause it yto strike the platen. lWhen the key lever is released the ribbon vibrator and its actuating partswill be free tomove downwardly,

' is adjusted intoposition c, Fig. 2, with the pin 48 in engagement with the depression 50 the ribbon will be. raised f a A maximum amount at each operation of a key lever. lf the lower half or Zone of the ribbon is colored red this adjustment of the arm 45 will be used for writing on red. When the arm 45 is shifted to position/b with the pin 4S in contact with the depression 51 the pin v54 will be shifted forwardly a short dis'-k tance away from the contact member 55so that the two will move into engagement at a later time in the operation of a keyl lever and the ribbon will be raise-d a lesser dislance. This adjustment'will vbring the upper Zone or the ribbon over the printing point for writing on black. lf the arm 45 is swung to its uppermost position a the pin 54 will be shifted out of the path of movement of the contact member 55 and operation of a key lever will not affect the ribbon vibrator. rThis position may be used for cutting stencils.

The downward movement' of the segment 4() is limited by a tail-piece 6.5 which projects into a slot in the rear wall of 'the frame 10.

`When the arms 11 and the platen carriage frame mounted thereon are swung upwardly and forwardly to their folded position the bar 31 will be released permitting forward tilting of the ribbon vibrator support 28 which will thus be folded out of the path of the platen frame to its fullline position sliown in Fig. 1. During the folding movement of the ribbon vibrator th'e pin 35 will slide in the slot 36 but will remain in engagement with the tor and its support to its operating position.

The movement of the vibrator frame will take place after the platen carriage frame and platen have passed the position to which the vibrator is subsequently moved, thus avoiding any interference on the part of the vibrator with the movement of 'the platen carriage frame.

l claim 1. A typewriter having frame parts foldable relative to one another, a ribbon vibrator foldably mounted on one of said parts and normally positioned in the path of folding of the other of said parts, and means controlled by said frame part-s for moving said vibrator in operating position when said frame parts are moved into operating position relative to one another.

2. ln ay typewriter, a main frame having a platen carriage frame foldably mounted thereon, a ribbon vibrator foldably mounted on said main frame and normally positioned in the path of folding of said platen oarriage frame, and mea-ns controlled by said platen carriage frame for restoring said vibrator in operatingpition when said platen carriage frame is moved into operating posit-ion and 'subsequent to the movement of said platen carriage frame past the normal position of said vibrator. 3. lin a typewriter, a main frame having a platen carriage frame mounted thereon for movement intro and out of operating position, a platen carriage movable along said platen carriage frame, a ribbon vibrator foldably mounted on said main frame, and means actuated by said platen carriage frame when moved into operating position to automatically move said vibrator from foldd position to operating position.

4. lin a typewriter, a main frame, `a platen carriage frame mounted thereon for movement into and out of operating position, a platen carriage mounted to travel on said pla-ten carriage frame, ya ribbon vibrator foldably mounted on said main frame, and

llO

means actuated by said platen carriage frame when moved into operating position to automatically restore said ribbon vibrator to operating position subsequent to 'the movement of said platen carriage frame past the position occupied by said ribbon vibrator when in operating position.

5. In combination, ya typewriter having a main frame a ribbon vibrator support foldably mounted on said main frame below the top thereof, a vibrator slidably mounted'on said support, actuating means for said vibrator, and a movable connection between said vibrator and its actuating means above the pivot for said support to permit folding of said vibrator and support to a position within said main frame while maintaining connection with its actuating means.

6. In combination, a typewriter having a ribbon vibrator foldably mounted thereon, a pin on said vibrator, and actuating means for said vibrator vhaving a curved slot engagingsaid pin 'and permitting movement of said pin in said slot during folding movement of said vibrator, both ends of said Slot being closed to retain said pin therein during folding.

7. In a typewriter, a frame member, a vibrator support pivotally mounted on said frame member, a vibrator slidably-mounted on said support, an oscillatory member for actuating said vibrator, and a pin and slot connection between said vibrator and said oscillatory member, the slot for said connection being curved about the pivotal axis of said vibrator support to permit folding of ysaid vibrator support while maintaining conpivotally and non-separably connected with position.

its actuating means tb permit folding of said vibrator on said frame.

9. 1n a typewriter, a mainframe, a platen carriage frame .foldably mounted on said main frame, a ribbon vibrator support foldably mounted on said main frame, a ribbon operative positioninv the path o-f folding of said platen carriage frame, a vibrator slidably mounted on said support, key levers on said main frame, means actuated by said key leversfor operating said vibrator, and a pin and slot connection between said vibratorl and its operating means arranged to permit folding of said vibrator support while maintaining connection between said vibrator and its operating means and means actuated by said platen carriage frame during movement thereof into 4operating position and subsequent to passing the operating position of said ribbon vibrator for automatically restoring said ribbon vibrator to operating' position.

11. In a typewriter, -a main frame, a platen carriage frame foldably mounted on said main frame, a ribbon vibrator Support foldably mounted on said main frame, a ribport, key levers on said main frame, means actuated -by said key levers for operating said vibrator, movable means for maintaining connection between said vibrator and its operating means during the folding movement of said vibrator support, and means actu-ated by said platen carriage frame for automatically restoring said vibrator support to its operating position when said platen carriage frame is moved to operating In testimony whereof I have` signed my name to this specification on this 27 th day of August, A. D. 1921. v

o'rTo A. noKANSoN.

`bon vibrator slidably mounted on said sup- 

